Thanks for your nice comment and the UX feedback. It's probably related to /t/902383/option-to-prevent-keyboard-page-scrolling-for-embedded-... I am not sure if I can upload a new version during voting (will ask on Discord) but as a temporary fix try pressing E instead of Space/Enter (or going to Fullscreen and then ending fullscreen) or try the Wavedash version (link in game description).